Appendix D Traffic Impact Analysis - westplainseis.com

MOVEMENT SUMMARY
Middle Dwy./Hwy. (YEAR 2015 PM PEAK, ALT.1,PH.2)
West Plains Development
Roundabout
Site: Roundabout
Movement Performance - Vehicles
Mov ID Turn
Demand
Deg. Average Level of 95% Back of Queue Prop. Effective Average
Flow HV Satn Delay Service Vehicles Distance Queued Stop Rate Speed
veh/h % v/c sec veh ft per veh mph
East: Hwy. 2
6T T 1797 1.0 0.847 23.0 LOS C 14.6 368.3 0.97 0.93 20.0
6R R 535 1.0 0.333 0.1 X X X X 0.37 31.7
Approach 2332 1.0 0.847 17.8 LOS B 14.6 368.3 0.74 0.80 22.0
North: Middle Dwy.
7L L 655 1.0 1.110 123.5 LOS F 21.8 549.5 1.00 1.93 8.3
4R R 209 1.0 0.130 0.0 X X X X 0.37 31.7
Approach 864 1.0 1.110 93.7 LOS F 21.8 549.5 0.76 1.55 9.9
West: Hwy. 2
5L L 278 1.0 0.391 10.2 LOS B 2.2 55.3 0.71 0.90 23.4
2T T 1559 1.0 0.826 23.1 LOS C 10.5 264.4 0.95 1.13 20.7
Approach 1837 1.0 0.826 21.1 LOS C 10.5 264.4 0.91 1.09 21.1
All Vehicles 5033 1.0 1.110 32.0 LOS C 21.8 549.5 0.81 1.04 17.7
X: Not applicable for Continuous movement.
Level of Service (LOS) Method: Delay (HCM 2000).
Roundabout LOS Method: Same as Signalised Intersections.
Vehicle movement LOS values are based on average delay per movement
Intersection and Approach LOS values are based on average delay for all vehicle movements.
Roundabout Capacity Model: SIDRA Standard.
HCM Delay Model used.
Processed: Wednesday, July 13, 2011 7:13:42 AM Copyright © 2000-2011 Akcelik and Associates Pty Ltd
SIDRA INTERSECTION 5.1.3.1990
www.sidrasolutions.com
Project: P:\S\SPTR00000001\0600INFO\Traffic\April 2011-Final TIA\Sidra\7-12-11\Hwy.2-Middle Dwy\Alt1-
PH2.sip
8000011, DAVID EVANS & ASSOCIATES INC, SINGLE